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Search Results: 1 - 10 of 24162 matches for " Jorge Henriquez-Pino "
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Músculos Papilares en el Corazón del Avestruz (Struthio camelus)
Figueroa,Marco; Henriquez-Pino,Jorge;
International Journal of Morphology , 2009, DOI: 10.4067/S0717-95022009000200020
Abstract: the heart of the ostrich (struthio camelus), just like the domestic birds's heart, has a muscular right atrioventricular valve without chordae tendinae and a membranous left atrioventricular valve with chordae tendinae than extends between the cusps and 3 papillary muscles.the aim of the study was to describe the papillary muscles, number, position and some morphologic characteristics. fifty ostrich hearts (struthio camelus), were dissected and fixed in 10 % formalin and which got histological slices from 7 microns themselves they were stained with van gieson and h e. the macroscopic study evidenced absence of papillary muscles in the right ventricle and in the left ventricle 3 muscular masses formed by longitudinal trabeculae carneae that give insertion to the chordae tendinae. it was observed in the histological slices that the dorsal and ventral insertion points of the right atrioventricular valve to the ventricular wall, are prolongations of the muscle that forms the valve and shows conductive cardiac fibers. in the left ventricle, the longitudinal trabeculae carneae also show conductive cardiac fibers the ones that extend to the zone of insertion of the chordae tendinae. the results evidence that the heart of the ostrich (struthio camelus) does not have papillary muscles of conical form like in the human heart, are more developed muscular formations than in the domestic birds's heart and functionally acts like papillary muscles to show conductive cardiac fibers.
Músculos Papilares en el Corazón del Avestruz (Struthio camelus) Papillary Muscles in the Heart of the Ostrich (Struthio camelus)
Marco Figueroa,Jorge Henriquez-Pino
International Journal of Morphology , 2009,
Abstract: El corazón del avestruz (Struthio camelus), al igual que el corazón de las aves domésticas, tiene una valva atrioventricular derecha muscular sin cuerdas tendinosas, y una valva atrioventricular izquierda membranosa con cuerdas tendinosas que se extienden entre las cúspides y 3 músculos papilares. El objetivo del estudio fue describir los músculos papilares, número, ubicación y algunas características morfológicas. Se utilizaron 50 corazones de avestruz (Struthio camelus), que fueron disecados y fijados en formalina tamponada al 10%, y se obtuvieron cortes histológicos de 7 mieras los cuales fueron te idos con Van Gieson y H-E. El estudio macroscópico mostró ausencia de músculos papilares en el ventrículo derecho y en el ventrículo izquierdo 3 masas musculares formadas por trabéculas carnosas longitudinales que dan inserción a las cuerdas tendinosas. En los cortes histológicos se observó que los puntos de inserción dorsal y ventral de la valva atrioventricular derecha a la pared ventricular, son prolongaciones del músculo que forma la valva y presentan fibras conductoras cardíacas. En el ventrículo izquierdo, las trabéculas carnosas longitudinales también presentan fibras conductoras cardíacas las que se extienden hasta la zona de inserción de las cuerdas tendinosas. Los resultados muestran que el corazón del avestruz (Struthio camelus) no tiene músculos papilares de forma cónica como en el corazón humano, son formaciones musculares más desarrolladas que en el corazón de las aves domésticas y funcionalmente actúan como músculos papilares al presentar fibras conductoras cardíacas. The heart of the ostrich (Struthio camelus), just like the domestic birds's heart, has a muscular right atrioventricular valve without chordae tendinae and a membranous left atrioventricular valve with chordae tendinae than extends between the cusps and 3 papillary muscles.The aim of the study was to describe the papillary muscles, number, position and some morphologic characteristics. Fifty ostrich hearts (Struthio camelus), were dissected and fixed in 10 % formalin and which got histological slices from 7 microns themselves they were stained with Van Gieson and H E. The macroscopic study evidenced absence of papillary muscles in the right ventricle and in the left ventricle 3 muscular masses formed by longitudinal trabeculae carneae that give insertion to the chordae tendinae. It was observed in the histological slices that the dorsal and ventral insertion points of the right atrioventricular valve to the ventricular wall, are prolongations of the muscle that forms the valve
Distribui??o intraneural das artérias na cauda eqüina de recém-nascidos
Matamala-Vargas, Fernando;Henriquez-Pino, Jorge;Prates, José Carlos;
Arquivos de Neuro-Psiquiatria , 1993, DOI: 10.1590/S0004-282X1993000200012
Abstract: mesoscopic study of the irrigation of the lumbosacral segment of the spinal cord and the roots of the cauda equina was carried out in corpses of 18 brazilian newborns of either sex. through the abdominal portion of the aorta nine newborns were injected with neoprene latex and the others were injected with a 5% solution of gelatin coloured with black indian ink. the latter were cleared by the spalteholz technique. two types of arterial distribution were determined: (a) proximal and distal radicular arteries supplying the corresponding roots, which presented in their middle third an arterial low density, that is, hypo-irrigation; (b) segmental spinal arteries, varying in number, more frequent on the left side and having a larger caliber than that of the radicular arteries, accompanying the roots without providing collateral branches to the neural roots and anastomosed with the spinal arteries.
Estudo anat?mico da artéria torácica interna aplicado à cirurgia cardiovascular
HENRIQUEZ-PINO, Jorge A;GOMES, Walter José;PRATES, José Carlos;BUFFOLO, ênio;
Revista Brasileira de Cirurgia Cardiovascular , 1997, DOI: 10.1590/S0102-76381997000100014
Abstract: the internal thoracic artery (ita) was studied because of its increased utilization in myocardial revascularization surgery due to the excellent long-term results. a review of its anatomical characteristics to clear some morphological aspects was made, aiming to help the extension of its utilization and prevent operative complications. the study was carried out in 100 cadavers; the anterior sternocostal wall of the thorax was removed and the arteries were injected with neoprene latex. the ita originated directly from the subclavian artery in 82.5% and from a common trunk with other arteries in 17.5%. its lenght was 20.4 ± 2.1 cm in average and the most frequent end point was the 6th intercostal space (52.5%). the end point form was as bifurcation in 93% and as trifurcation in 7%. the relation of ita with the sternal margins was, on average, 10.3 ± 3.2 mm at the level of first intercostal space and 19.2 ± 6.0 mm at the level of 6th intercostal space. it was covered by the transverse muscle of thorax in a distance of 7.5 ± 2.7 cm long (average) and the lateral costal branch was present in 15%. the ita was crossed anteriorly by phrenic nerve in 70% and posteriorly in 30%. informations provided by this study may help prevent complications in ita dissections and to improve our knowledgement on its anatomical characteristics.
Estudo anat mico da artéria torácica interna aplicado à cirurgia cardiovascular
HENRIQUEZ-PINO Jorge A,GOMES Walter José,PRATES José Carlos,BUFFOLO ênio
Revista Brasileira de Cirurgia Cardiovascular , 1997,
Abstract: Com a intensa utiliza o da artéria torácica interna (ATI) na opera o de revasculariza o do miocárdio, estudamos sua anatomia com a finalidade de esclarecer aspectos morfológicos que possibilitem extender sua utiliza o e prevenir complica es pós-operatórias. Em 100 cadáveres foram retirados os plastr es esternocostais e injetadas as ATIs com Látex Neoprene. A ATI originou-se diretamente da artéria subclávica em 82,5% e de um tronco comum com outras artérias em 17,5%. O comprimento médio foi de 20,4 ± 2,1 cm e o ponto de termina o mais freqüente foi ao nível do 6o espa o intercostal (e.i.) (52,5%). A forma de termina o se fez como bifurca o em 93% e como trifurca o em 7%. A rela o da ATI com a margem esternal foi de 10,3 ± 3,2 mm ao nível do 1o e.i. e 19,2 ± 6,0 mm ao nível do 6o e.i. A ATI está recoberta pelo músculo transverso do tórax numa extens o média de 7,5 ± 2,7 cm e apresenta o ramo costal lateral em 15%. O nervo frênico é anterior à ATI em 70% e posterior em 30%. O estudo forneceu subsídios que podem contribuir para minimizar as complica es pós-operatórias.
Relaciones Biométricas del Anillo Atrioventricular Izquierdo y las Arterias Coronarias en el Hombre
Pradenas,Ilse; Henriquez,Jorge; Olave,Enrique;
International Journal of Morphology , 2009, DOI: 10.4067/S0717-95022009000300010
Abstract: the relationships between the coronary arteries and the atrioventricular rings are important in cases of substitution or plastic of the corresponding valve. the vicinity of the circumflex branch of the left coronary artery to the left atrioventricular ring, at level of the previous corner, it has brought surgical complications, in some cases with fatal results. due to this, we consider necessary to study the relationships biometric between the coronary arteries and the left atrioventricular ring. we use 58 hearts, 28 fixed hearts of chilean individuals and 30 fresh hearts of brazilian individuals, of ages between 18 and 84 years, of both sexes and without apparent heart surgery. the region of both coronary sulcus was dissected and we classified the pieces according to the type of coronary dominance. later on, the atrium were dried up leaving visible the atrioventricular rings and their relationship with the coronary arteries. measurement of the distances were made (in mm) of the coronary arteries and their branches, in relation to the left atrioventricular ring. five points settled down in the later portion of the ring, distributed in having felt anti-timetable. the points 1 and 5 located at level of the previous and later corners, respectively. the smallest distance between the branches of the coronary arteries and the left atrioventricular ring was presented in hearts with left coronary dominance, and it was of 3,8 mm (fixed hearts) and 3,0 mm (fresh hearts).
Características Biométricas de la Silla Turca en Telerradiografías Laterales de Individuos Mapuches y No Mapuches de la IX Región, Chile
Henriquez,Jorge; Fuentes,Ramón; Sandoval,Paulo;
International Journal of Morphology , 2010, DOI: 10.4067/S0717-95022010000200032
Abstract: the lateral cephalogram is an x-ray routinely used in orthodontics. this type of plane x-ray is the best choice to investigate the morphometric characteristics of the sella turcica, its size and shape, creating a variation. taveras & wood described a method to determine the size of the sella in radiography. measuring the diameter of the anterior sella turcica and the depth of it from the lowest point to a line connecting the top of the back of the sella to the sellar tuber. this led to a study of the present characteristics , which reported observations in 88 lateral teleradiograph takes, of which 44 were young adult mapuche individuals and 44 non mapuche of both sexes, all native to the ix region. the anteroposterior diameter of the sella turcica was 12.85 ± 1.5mm, ranging from 10.05 to 15.95 mm, the depth was 10.31 ± 1.3 mm, with ranges of 7.20 to 13.36 mm, in mapuche individuals anteroposterior diameter was 12.11 ± 2.4 mm, ranging from 6.72 to 17.06 mm, the depth was 11.01 ± 1.4 mm, ranging from 7.92 to 13.67mm. sellar area in mapuches has been set at 132.4 mm2 and non mapuche of 133.3 mm2. the shape of the fossa of the sella turcica was circular in 36 cases, oval in 30 cases and plane in 22 cases.
Relaciones Biométricas del Anillo Atrioventricular Izquierdo y las Arterias Coronarias en el Hombre Biometric Relationships Between the Left Atrioventricular Ring and the Coronary Arteries in Man
Ilse Pradenas,Jorge Henriquez,Enrique Olave
International Journal of Morphology , 2009,
Abstract: La relación de las arterias coronarias con los anillos atrioventriculares se torna importante en casos de reemplazo o plastía de la valva correspondiente. La proximidad de la rama circunfleja de la arteria coronaria izquierda al anillo atrioventricular izquierdo, a nivel de la comisura anterior, ha traído complicaciones quirúrgicas, en algunos casos con resultados fatales. Basado en lo anterior, estudiamos las relaciones biométricas entre las arterias coronarias y el anillo atrioventricular izquierdo. Utilizamos 58 corazones de individuos chilenos, 28 fijados en formaldehído al 10 % y 30 frescos de individuos brasile os, de edades comprendidas entre 18 y 84 a os, de ambos sexos y sin aparente cirugía cardíaca. Disecamos la región de ambos surcos coronarios, para luego clasificar las piezas según el tipo de dominancia coronaria. Luego, los atrios fueron resecados dejando visibles los anillos atrioventriculares y su relación con las arterias coronarias. Se efectuaron mediciones de la distancia de las arterias coronarias y sus ramas en relación al anillo atrioventricular izquierdo. Se establecieron 5 puntos en la porción posterior del anillo, distribuidos en sentido antihorario. Los puntos 1 y 5 localizados a nivel de las comisuras anterior y posterior, respectivamente. La menor distancia entre las ramas de las arterias coronarias y el anillo atrioventricular izquierdo se presentó en corazones con dominancia coronaria izquierda, y fue de 3,8 mm (corazones fijados) y 3,0 mm (corazones frescos).El tercio proximal de la rama circunfleja, asociado a una mayor proximidad al anillo mitral, constituye el área de mayor predisposición a una lesión iatrogénica durante un reemplazo y/o plastía valvar. The relationships between the coronary arteries and the atrioventricular rings are important in cases of substitution or plastic of the corresponding valve. The vicinity of the circumflex branch of the left coronary artery to the left atrioventricular ring, at level of the previous corner, it has brought surgical complications, in some cases with fatal results. Due to this, we consider necessary to study the relationships biometric between the coronary arteries and the left atrioventricular ring. We use 58 hearts, 28 fixed hearts of Chilean individuals and 30 fresh hearts of Brazilian individuals, of ages between 18 and 84 years, of both sexes and without apparent heart surgery. The region of both coronary sulcus was dissected and we classified the pieces according to the type of coronary dominance. Later on, the atrium were dried up leaving visible the atrioventricular
Características Biométricas de la Silla Turca en Telerradiografías Laterales de Individuos Mapuches y No Mapuches de la IX Región, Chile Biometric Characteristics of the Sella Turcica in Lateral Telerradiographs of Individuals Mapuche and Non Mapuche of the IX Region, Chile
Jorge Henriquez,Ramón Fuentes,Paulo Sandoval
International Journal of Morphology , 2010,
Abstract: El cefalograma lateral es una radiografía que se usa rutinariamente en la ortodoncia. Este tipo de radiografía plana es la mejor opción para investigar las características morfométricas de la silla turca, determinando su tama o y forma y sus eventuales variaciones. Taveras & Wood han descrito un método, para determinar el tama o de la silla turca en radiografías. Midiendo el mayor diámetro anteroposterior de la silla turca y la profundidad de ella desde el punto más bajo a una línea que conecta la cima del dorso de la silla al tubérculo selar. Esto nos motivó llevar a cabo un estudio de estas características, para lo cual se registraron las correspondientes observaciones en 88 teleradiografias laterales, de las cuales correspondían a 44 individuos adultos jóvenes mapuches y 44 no mapuches, de ambos sexos, todos pertenecientes a la IX Región. El diámetro anteroposterior de la silla turca fue de 12,85 ± 1,5 mm, con rangos entre 10,05 a 15,95 mm; la profundidad fue de 10,31± 1,3 mm, con rangos de 7,20 a 13,36 mm; en individuos no mapuche el diámetro anteroposterior fue de 12,11 ± 2,4 mm, con rangos entre 6,72 a 17,06 mm; la profundidad fue de 11,01± 1,4 mm, con rangos de 7,92 a 13,67 mm. El área selar en mapuches fue de 132,4 mm2; y en no mapuches de 133,3 mm2. La forma de la fosa fue circular en 36 casos, oval en 30 casos y plana en 22 casos. The lateral cephalogram is an x-ray routinely used in orthodontics. This type of plane x-ray is the best choice to investigate the morphometric characteristics of the sella turcica, its size and shape, creating a variation. Taveras & Wood described a method to determine the size of the sella in radiography. Measuring the diameter of the anterior sella turcica and the depth of it from the lowest point to a line connecting the top of the back of the sella to the sellar tuber. This led to a study of the present characteristics , which reported observations in 88 lateral teleradiograph takes, of which 44 were young adult Mapuche individuals and 44 non Mapuche of both sexes, all native to the IX Region. The anteroposterior diameter of the sella turcica was 12.85 ± 1.5mm, ranging from 10.05 to 15.95 mm, the depth was 10.31 ± 1.3 mm, with ranges of 7.20 to 13.36 mm, in Mapuche individuals anteroposterior diameter was 12.11 ± 2.4 mm, ranging from 6.72 to 17.06 mm, the depth was 11.01 ± 1.4 mm, ranging from 7.92 to 13.67mm. Sellar area in Mapuches has been set at 132.4 mm2 and non Mapuche of 133.3 mm2. The shape of the fossa of the sella turcica was circular in 36 cases, oval in 30 cases and plane in 22 cases.
The Relationship between the Diagnosis of Human Immunodeficiency Virus (HIV) and Executive Functions in School Age Children  [PDF]
Mariana M. Pino Melgarejo, Jorge A. Herrera Pino, Norella S. Jubiz Bassi
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.65057
Abstract: The human immunodeficiency virus (HIV) affects not only adults, but also children, many of whom are infected in the perinatal period and suffer the consequences throughout their development. One of the areas of cognition frequently adversely affected by the presence of HIV is intellectual functioning. However, although conceptually akin to intelligence, executive functions encompass a wider range of abilities and skills. The purpose of this study was to determine if executive functions, as such, are impaired in children who are HIV infected. A sample of 60 children between the ages of 6 and 12 years participated in this study. The performance of 30 HIV infected children in an instrument designed for the assessment of executive functions in school age children (ENFEN) was compared with the performance of a group of 30 healthy controls, matched for age, gender, and socio-economic status. The results revealed impairments in HIV infected children across all executive functions assessed.
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